Welcome to a new series on MLSsoccer.com, where each week we'll take a look at some of the best images from the week that was in Major League Soccer. Here's a look back at the best shots from May 11-12, and check back every Monday as the series continues.

Philadelphia Union goalkeeper Zac MacMath (center) skies to take the ball off the head of Chicago's Gonzalo Segares during the Union's 1-0 win at Toyota Park.

Felipe's 39th minute goal wasn't the game-winner for Montreal against Real Salt Lake last weekend - far from it, in fact, in what turned out to be a 3-2 thriller - but the Brazilian celebrated in style, playing up to Impact fans behind the corner flag.

The backflip goal celebration is nothing new to the world of soccer, but it's always spectacular when it gets thrown out on the field. Seattle Sounders forward Obafemi Martins broke out the celebration during Seattle's 4-0 romp over San Jose.

We already knew Vancouver Whitecaps forward Darren Mattocks (right) could jump over the top of MLS defenders, but we had yet to see him jump chest high on Omar Gonzalez and throw a freeze frame pose at us. Now we have.

Don't lose focus of that ball, Bobby Shuttlesworth. Stare right on down that tunnel and don't break eye contact.

I'm just praying that Columbus Crew midfielder Matias Sanchez stuck the landing on this splitting dismount, and didn't rip the seat of his pants.

Well, see what had happened was.... FC Dallas midfielder Je-Vaughn Watson (left) really wanted to win the ball, but then Dwayne De Rosario told him, "Shoulder ride's over, pal," and dropped him like a sack of potatoes.

Portland Timbers midfielder Rodney Wallace (right) is in the form of his life of late. So much so, that he's carrying the entire Timbers team on his back right now. Literally, and figuratively.

This is Houston Dynamo vs. Sporting Kansas City in a nutshell, right here. Mechack Jerome (left) wins the ball in the air, gets upended and slams heavily to the ground. Sporting got slammed to the ground a few times, but won, 1-0.

With many of the title races in Europe's top leagues all but decided, we're reached the time of the year when the proverbial “silly season” cranks up in anticipation of the international transfer window's arrival this summer.

But when media reports in the club's own backyard place a past Sueño MLS winner on Spanish superpower FC Barcelona's radar, it's worth taking note.

On Tuesday, Barcelona-based publication Mundo Deportivo, citing “some Argentine media,” posted a report claiming that River Plate striker Gabriel Funes Mori is back in the Catalan club's crosshairs as a transfer target.

The Argentina-born, Texas-raised No. 9 was River Plate's leading scorer during the first half of the 2012-13 season and has been linked to Barça and other European powers like AC Milan in the past. But he first rose to prominence as the winner of the 2008 Sueño MLS competition, which earned him a spot in FC Dallas' youth academy.

That opportunity quickly led to a trial with England's Chelsea FC. While Funes Mori did not catch on with the Blues, members of River Plate's staff spotted him and both he and his twin brother Ramiro soon joined the renowned Buenos Aires club and rapidly rose through the ranks.

Funes Mori played for Argentina's U-20 side and made an appearance for the senior team in a friendly against Brazil last year, but US national team coach Jurgen Klinsmann reportedly took notice of Funes Mori last winter and invited him to switch allegiance to the US.

Funes Mori turns 22 later this year and probably isn't quite the finished product yet. But if he does wind up at Barcelona, he'll be the first player with American ties to join the Blaugrana's senior squad.